Document Type and Number:
Japanese Patent JPS5555836
Kind Code:
U
Application Number:
JP13898378U
Publication Date:
April 15, 1980
Filing Date:
October 06, 1978
Export Citation:
International Classes:
G03B21/00; G03B23/02; G03B31/06; (IPC1-7): G03B23/02; G03B21/00; G03B31/06